Characteristics and Application of Terahertz Imaging Non-destructive Detection

There has been a significant interest in employing terahertz (THz) technology, spectroscopy and imaging for nondestructive evaluation. The implementations of some different THz imaging measurements for non-destructive examination of diverse materials in practical applications are briefly introduced. Examples of the measurement of maize seeds and fuel tank insulation foam panel and razor blade using THz pulsed spectroscopic imaging or continuous-wave (CW) THz imaging are presented and analyzed, exploring the characteristics of these modalities. Furthermore, the spatial patterns of the maize seeds were extracted, along with a view of a progress in real-time imaging and potential prospects of THz imaging technology.